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.~ ~ III IIIIIIIIIIIIIIII ~^ <br />999 <br /> STATE OF COLORADO <br />DtVI510N OF ~btINERALS AND GEOLOGY <br />~eu,trlment of Natural Resources <br />1313 Sherman St., Raom ? 15 <br />Denvel. l=ulurado BU203 D I V I S I O N O <br />Phone: 13071865-355i MINERAL <br />F:~\ ~ 0031 83?-8106 Sc <br /> G E O L O G `. <br />June 27, 2000 ONDENCE FIIE a E c t n n a r. o <br /> FOR YDUR CORRESP MINING•SHFE7` <br />Mr. Dick Wolfe ain Owens <br />Office of the State Engineer covpmur <br />1313 Sherman Sveet, Room 818 Greq E. bValchcr <br />Denver. CO 80203 E.eaine Dvpaor <br /> hIi<h~el 8. Lang <br /> On~s~on Oveaor <br />RE :Henderson -Groundwater Investigation <br />The Division of Minerals & Geology requests your assistance in evaluating possible impacts to a number of <br />groundwater users in the Henderson area from nearby, active sand & gravel pits. As you may know, Henderson is <br />located in Adams County and near the South Platte River. Recently, the Division of Minerals & Geology has <br />recieved three (3) separate complaints from various well owners in the Henderson area. The complaints are <br />quantitative in nature and concern significant drops in the ground water surface. It appears that at least two (2) of the <br />wellsn question are registered with the Office of the Stale Engineer (OSE) and may be within 600 feet of at least <br />one or more active mining operation. This information was confirmed by a DMG staff member on June 23, 2000 <br />during a site visit with Robert Stahl, Water Commissioner, District 2. <br />The Henderson area contains a ttumbec of active alluvial pits, most of which are dewatering and using dry mining <br />methods. A few of the pits have already been filled with water but have not yet been released from reclamation <br />responsibility. The Division of Minerals & Geology's (DMG's) interest in this matter is to determine the following: <br />1) Are the operations listed on the following page in compliance with all appropriate OSE requirements, ie: well <br />permit, TSSP, augmentation plats, etc., 2) Are there any qualified wells, ie: properly completed to the first aquitard, <br />functional, & registered, within fi00 feet of any of the operations listed on [he following page, 3) Are there any wells <br />(complaintant or other) that qualify for protection of water rights under State statutes, 4) Has a properly qualified <br />well experienced an adverse impact, and if so, is the impact directly attributed to the practices of a particular mining <br />operation or combination mining operations, as opposed to having been adversely affected by drought conditions or <br />some other factor, and 5) If a properly qualified well has been adversely and directly affected by a mining operation <br />or mining operations, is the impact attributed to one particular operation or to a cumulative impact of several or more <br />operations that may be more than 600 feet away from the well. <br />The Division requests your assisutnce in this matter and would like to meet with you at your earliest convenience to <br />determine a svategy For properly evaluating this concern and responding to the complaintants. <br />Sincerely, <br />~ -. <br />i <br />H. Bruce Humphries <br />Minerals Program Supervisor <br />cc: Tom Schreiner & Carl hlount, DMG <br />Robert Stahl, DWR <br />